After five doubtless successful years, Maserati revamps its flagship, the Quattroporte exotic four-door sedan. Treated to some new bodywork to tauten the Pininfarina lines and to appear more aggressive and GranTurismo like, from the tip to the tail. Fortunately, the hasting sedans got an engine update as they are driven by the more powerful 430-hp 4.7-liter unit provided by the Alfa 8C tar-boiler and of course the anticipated transmission update with the built-in ZF-sourced six-speed automatic.